Remove *-onbuild images.

Onbuild images are deemed as 'useful but confusing'.

Rather than produce onbuild images, projects should consider providing
example Dockerfiles for consumers to use for reference.

Almost all official Docker Hub project have removed their onbuilds now.

Ref: docker-library/official-images#2076
Ref: docker-library/docs@3823017

Signed-off-by: Lee Jones <lee.jones@linaro.org>

Author: Lee Jones

.travis.yml

@@ -11,13 +11,9 @@ services:
 
 env:
   - Dockerfile=v0.12/alpine
-  - Dockerfile=v0.12/alpine-onbuild
   - Dockerfile=v0.12/debian
-  - Dockerfile=v0.12/debian-onbuild
   - Dockerfile=v1.2/alpine
-  - Dockerfile=v1.2/alpine-onbuild
   - Dockerfile=v1.2/debian
-  - Dockerfile=v1.2/debian-onbuild
 
 before_script:
   - make image DOCKERFILE=$Dockerfile VERSION=test

Dockerfile.sample

@@ -1,4 +1,4 @@
-FROM fluent/fluentd:v0.12-onbuild
+FROM fluent/fluentd:v0.12
 MAINTAINER YOUR_NAME <...@...>
 
 RUN apk add --update --virtual .build-deps \
@@ -13,4 +13,7 @@ RUN apk add --update --virtual .build-deps \
  && rm -rf /var/cache/apk/* \
            /home/fluent/.gem/ruby/2.3.0/cache/*.gem
 
+COPY fluent.conf /fluentd/etc/
+COPY entrypoint.sh /bin/
+
 EXPOSE 24284

Dockerfile.template.erb

@@ -1,5 +1,4 @@
 <% fluentd_ver = version.split("-").first[1..-1] %>
-<% is_onbuild = (version.split("-").last == "onbuild") %>
 <% is_alpine = (dockerfile.split("/").last.split("-").first == "alpine") %>
 <% is_armhf = (dockerfile.split("/")[1] == "armhf") %>
 <% is_windows = (dockerfile.split("/").last.split("-").first == "windows") %>
@@ -163,11 +162,6 @@ COPY entrypoint.sh /bin/
 RUN chmod +x /bin/entrypoint.sh
 <% end %>
 
-<% if is_onbuild %>
-ONBUILD COPY fluent.conf /fluentd/etc/
-ONBUILD COPY plugins /fluentd/plugins/
-<% end %>
-
 ENV FLUENTD_OPT=""
 ENV FLUENTD_CONF="fluent.conf"
 

Makefile

@@ -14,22 +14,16 @@
 IMAGE_NAME := fluent/fluentd
 X86_IMAGES := \
 	v0.12/alpine:v0.12.43,v0.12 \
-	v0.12/alpine-onbuild:v0.12.43-onbuild,v0.12-onbuild \
 	v0.12/debian:v0.12.43-debian,v0.12-debian \
-	v0.12/debian-onbuild:v0.12.43-debian-onbuild,v0.12-debian-onbuild \
 	v1.2/alpine:v1.2.6,v1.2,edge,stable,latest \
-	v1.2/alpine-onbuild:v1.2.6-onbuild,v1.2-onbuild,edge-onbuild,stable-onbuild,onbuild \
 	v1.2/debian:v1.2.6-debian,v1.2-debian,edge-debian,stable-debian,debian \
-	v1.2/debian-onbuild:v1.2.6-debian-onbuild,v1.2-debian-onbuild,edge-debian-onbuild,stable-debian-onbuild,debian-onbuild \
 	v1.2/windows:v1.2.6-windows,stable-windows,windows
 #	<Dockerfile>:<version>,<tag1>,<tag2>,...
 
 # Define images for running on ARM platforms
 ARM_IMAGES := \
 	v1.2/armhf/debian:v1.2.6-debian-armhf,v1.2-debian-armhf,edge-debian-armhf,stable-debian-armhf,debian-armhf \
-	v1.2/armhf/debian-onbuild:v1.2.6-debian-armhf-onbuild,v1.2-debian-armhf-onbuild,edge-debian-armhf-onbuild,stable-debian-armhf-onbuild,debian-armhf-onbuild \
 	v1.2/armhf/alpine:v1.2.6-alpine-armhf,v1.2-alpine-armhf,edge-alpine-armhf,stable-alpine-armhf,alpine-armhf \
-	v1.2/armhf/alpine-onbuild:v1.2.6-alpine-armhf-onbuild,v1.2-alpine-armhf-onbuild,edge-alpine-armhf-onbuild,stable-alpine-armhf-onbuild,alpine-armhf-onbuild
 
 ALL_IMAGES := $(X86_IMAGES) $(ARM_IMAGES)
 

README.md

@@ -11,21 +11,12 @@ Fluentd Docker Image
 
 - `v0.12.43`, `v0.12`
   [(v0.12/alpine/Dockerfile)][101]
-- `v0.12.43-onbuild`, `v0.12-onbuild`
-  [(v0.12/alpine-onbuild/Dockerfile)][102]
 - `v0.12.43-debian`, `v0.12-debian`
   [(v0.12/debian/Dockerfile)][105]
-- `v0.12.43-debian-onbuild`, `v0.12-debian-onbuild`
-  `debian-onbuild`
-  [(v0.12/debian-onbuild/Dockerfile)][106]
 - `v1.2.6`, `v1.2`, `edge`, `stable`, `latest`
   [(v1.2/alpine/Dockerfile)][113]
-- `v1.2.6-onbuild`, `v1.2-onbuild`, `edge-onbuild`, `stable-onbuild`, `onbuild`
-  [(v1.2/alpine-onbuild/Dockerfile)][114]
 - `v1.2.6-debian`, `v1.2-debian`, `edge-debian`, `stable-debian`, `debian`
   [(v1.2/debian/Dockerfile)][115]
-- `v1.2.6-debian-onbuild`, `v1.2-debian-onbuild`, `edge-debian-onbuild`, `v1.1-debian-onbuild`, `stable-debian-onbuild`,
-  [(v1.2/debian-onbuild/Dockerfile)][116]
 
 
 We recommend to use debian version for production because it uses jemalloc to mitigate memory fragmentation issue.
@@ -100,8 +91,6 @@ This image is based on the popular [Alpine Linux project][1], available in
 Alpine Linux is much smaller than most distribution base images (~5MB), and
 thus leads to much slimmer images in general.
 
-Since `v0.12.26`, tags are separated into `vX.Y.Z` and `vX.Y.Z-onbuild`.
-
 ### `stable`, `latest`
 
 Latest version of stable Fluentd branch (currently `v1.0`).
@@ -118,12 +107,6 @@ Latest version of `vX.Y` Fluentd branch.
 
 Concrete `vX.Y.Z` version of Fluentd.
 
-### `onbuild`, `xxx-onbuild`
-
-This image makes building derivative images easier.
-See ["How to build your own image"](#how-to-build-your-own-image) section for
-more details.
-
 ### `debian`
 
 The image based on [Debian Linux image][7].
@@ -138,14 +121,14 @@ Furthermore, the base images enable support for cross-platform builds using the
 
 In order to build these images natively on ARM devices, the `CROSS_BUILD_START` and `CROSS_BUILD_END` Docker build arguments must be set to the shell no-op (`:`), for example:
 ```bash
-docker build --build-arg CROSS_BUILD_START=":" --build-arg CROSS_BUILD_END=":" -t fluent/fluentd:v1.2.6-onbuild v1.2/armhf/alpine-onbuild
+docker build --build-arg CROSS_BUILD_START=":" --build-arg CROSS_BUILD_END=":" -t fluent/fluentd:v1.2.6 v1.2/armhf/alpine
 ```
 (assuming the command is run from the root of this repository).
 
 ## How to build your own image
 
-You can build a customized image based on Fluentd's `onbuild` image.
-Customized image can include plugins and `fluent.conf` file.
+You can build a customized image based on the supplied `Dockerfile.sample` template.
+Customized image can include plugins and `fluent.conf` file (See 'COPY' instructions).
 
 
 ### 1. Create a working directory
@@ -160,8 +143,8 @@ cd custom-fluentd
 
 # Download default fluent.conf. This file will be copied to the new image.
 # VERSION is v0.12 or v0.14 like fluentd version and OS is alpine or debian.
-# Full example is https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/v0.12/debian-onbuild/fluent.conf
-curl https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/VERSION/OS-onbuild/fluent.conf > fluent.conf
+# Full example is https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/v0.12/debian/fluent.conf
+curl https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/VERSION/OS/fluent.conf > fluent.conf
 
 # Create plugins directory. plugins scripts put here will be copied to the new image.
 mkdir plugins
@@ -183,8 +166,8 @@ To add plugins, edit `Dockerfile` as following:
 ##### Alpine version
 
 ```Dockerfile
-# or v1.0-onbuild
-FROM fluent/fluentd:v0.12-onbuild
+# or v1.0
+FROM fluent/fluentd:v0.12
 
 # below RUN includes plugin as examples elasticsearch is not required
 # you may customize including plugins as you wish
@@ -197,13 +180,16 @@ RUN apk add --update --virtual .build-deps \
  && apk del .build-deps \
  && rm -rf /var/cache/apk/* \
            /home/fluent/.gem/ruby/2.4.0/cache/*.gem
+
+COPY fluent.conf /fluentd/etc/
+COPY entrypoint.sh /bin/
 ```
 
 ##### Debian version
 
 ```Dockerfile
-# or v1.0-debian-onbuild
-FROM fluent/fluentd:v0.12-debian-onbuild
+# or v1.0-debian
+FROM fluent/fluentd:v0.12-debian
 
 # below RUN includes plugin as examples elasticsearch is not required
 # you may customize including plugins as you wish
@@ -220,6 +206,9 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev" \
                   $buildDeps \
  && rm -rf /var/lib/apt/lists/* \
            /home/fluent/.gem/ruby/2.3.0/cache/*.gem
+
+COPY fluent.conf /fluentd/etc/
+COPY entrypoint.sh /bin/
 ```
 
 ##### Note
@@ -290,10 +279,6 @@ through a [GitHub issue](https://github.com/fluent/fluentd-docker-image/issues).
 [6]: https://docs.docker.com/engine/reference/logging/fluentd
 [7]: https://hub.docker.com/_/debian
 [101]: https://github.com/fluent/fluentd-docker-image/blob/master/v0.12/alpine/Dockerfile
-[102]: https://github.com/fluent/fluentd-docker-image/blob/master/v0.12/alpine-onbuild/Dockerfile
 [105]: https://github.com/fluent/fluentd-docker-image/blob/master/v0.12/debian/Dockerfile
-[106]: https://github.com/fluent/fluentd-docker-image/blob/master/v0.12/debian-onbuild/Dockerfile
 [113]: https://github.com/fluent/fluentd-docker-image/blob/master/v1.2/alpine/Dockerfile
-[114]: https://github.com/fluent/fluentd-docker-image/blob/master/v1.2/alpine-onbuild/Dockerfile
 [115]: https://github.com/fluent/fluentd-docker-image/blob/master/v1.2/debian/Dockerfile
-[116]: https://github.com/fluent/fluentd-docker-image/blob/master/v1.2/debian-onbuild/Dockerfile